GraphLab vs. Piccolo vs. Spark by Danny Bickson.
From the post:
I got an interesting case study from Cui Henggang, a first year graduate student at CMU Parallel Data Lab. Cui implemented GMM on GraphLab, for comparing its performance to Piccolo and Spark. His collaborators on this projects where Jinliang Wei and Wei Dai. The algorithm is described on Chris Bishop, Pattern Recognition and Machine Learning, Chapter 9.2, page 438.
Danny reports Chu will be releasing his report and posting his GMM code to the graphic models toolkit (GraphLab).
I will post a pointer when the report appears, here and probably in a new post as well.